Carbon ink printing

To avoid short-circuits in the PCB during carbon ink printing (it acts as a conductor) the following recommendations should be observed:

Carbon ink print 

TypeCharacteristics

SD2841 (PETERS)
Colour:
Black (mat)

Standard
IPC-SM-840C, Class H

Surface resistance
(with coat thickness ~25µm)
~ 20 Ohm/cm2

Conductivity
Very good

Resistance to HAL
good

Smooth surface